Calculations + Eqpt

Question 1

Weight

Answer 1

Updated version

For infants < 12 months: Weight (kg) = (0.5 × age in months) + 4

For children aged 1 to 5 years: Weight (kg) = (2 × age in years) + 8

For children aged 6 to 12 years: Weight (kg) = (3 × age in years) + 7

Question 2

ETT

Answer 2

ETT size = age/4 + 4

Take 0.5 if cuffed

Question 3

ETT depth

Answer 3

ETT size x 3

*​at lips = (age/2) + 12cm

*​at nares = (age/2) + 15cm

-​neonatal trachea is only 4cm in length

Question 4

ICC

Answer 4

ETT size x 3

Question 5

OG / NG / Foley Size

Answer 5

ETT size x 2

Question 6

Blade sizes

Answer 6

Question 7

LMA sizes

Question 8

Modified Parkland

Answer 8

3 x TBSA X wt
1/2 over 8hrs, then 1/2 over subsequent 16 hours

+

4:2:1 rule maintenance fluids

Question 9

IVF

Answer 9

Total fluid requirement = Maintenance + Deficit + Replace ongoing losses

Deficit = wt (kg) x % dehydration x 10

<5% Deficit replace over 24 hrs
>5% Defcit replace over 48 hrs